The phrase "to patch the game" means to fix or update a video game by making changes to its code or software.
Sentences with «to patch the game»
This means that as we continue to patch the game on PC, we'll now be able to roll out related patch content, as appropriate, on PS4 as well. (blog.us.playstation.com)
Hopefully the western release will have these patches already built in, but if they don't you'll more than likely have to patch the game right away before you play. (mechadamashii.com)